Improvement in nut and bolt fastenings



E. B. WIN GATE.

Nut and Bolt Fastenings.

I PatentedJan.14,1873.

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a m m m m 1 M Q C W m m I m w UNITED STATES PATENT 'QFFICE.

EDWARD B. WINGATE, OF FRIENDSHIP, NEW YORK.

IMPROVEMENT IN NUT AND BOLT FASTENINGS.

Specification forming part of Letters Patent No. 134,963, dated January 14, 1873.

To all whom it may concern:

Be it known that I, EDWARD B. WINGATE, of Friendship, in the county of Allegany and State of New York, have invented a certain Improved Self-Lockin g Nut, of which the following is a specification:

Nature and Objects of the Invention.

This invention relates to those means for preventing nuts from unscrewing which are contained within the nuts, and which are adapted to be manipulated to release the nuts. The first part of the invention consists ina dog, constructed with a projecting leverextension for the finger or thumb to engage with in releasing the nut. The second part of the invention consists in arranging the lockingdog in a vertical recess in the nut, so as to engage with the seat thereof.

Description of the Drawing.

Figures 1 and 2 illustrate the invention in a preferred form. Figs. 3 and 4 illustrate an inferior modification. Figs. 1 and 3 are plan views, partly in section, on the lines a and 0, Figs. 2 and 4. Figs. 2 and 4 are vertical sections on the lines D and d, Figs. 1 and 3 General Description.

may readily be released, when desired, by

means of the fingers without the use of tools. For this purpose a dog, E, with pivot 3 and spring or, is provided, and the nut is constructed with arecess, w, and an, intersecting perforation, o, to receive the same. The recess w may be a simple rectangular perforation, the springw being attached to the dog, as represented; or a spring of any preferred form may be secured in the recess. The recess is,

preferably,'vertical, as illustrated in Figs. 1 and 2, the dog engaging with the metallic seat'of the nut but the dog may engage with the thread of the screw, as illustrated in Figs. 3 and 4. The dog is constructed with a face, a, composed, preferably, of a plurality.of biting points or teeth, and with a lever-extension, t, projecting outside of the nut, by which to disengage the dog. As arranged to engage with the seat of the nut, the dog does not obstruct the sides of the nut, and does not impair the thread as when applied horizontally so as to engage with the bolt. It is preferable, also, as ceasing to act when the nut leaves its seat.

In applying the nut the resistance of the dog is at the backs of the teeth, and opposed to the pressure of the spring, which yields, and the dog slips easily on the engaging-surface. The bite of the dog prevents any backward movement while the dog is in active position; but, to release the nut it is only necessary to press back the projecting end of the dog with the finger, when the nut may be unscrewed even withouta wrench.

It is known that spring-catches and differently-constructed dogs have been applied to nuts so as to engage with the thread of the bolt, as in the inferior modification above described; and that nuts have been constructed with notched faces to engage with catches applied to the washers thereof; but the above-- Claim.

The following is therefore claimed as new: A screw-nut, D, having a pivoted dog, E, arranged in a vertical recess, w, so as to engage with the seat of the nut, and constructed and operating substantially as herein described.

EDWARD B. WINGATE.

Witnesses L. B. Scorn, FRANK Srnvnns. 

